LPC1754 USB mass storage

jalilisahar — Wed, 10 Dec 2025 11:31:24 GMT

I have designed a board with LPC1754 and connected a nor flash W25Q64 to it via spi. As the nor flash is not formatable to FAT16 with cmsis FileSystem, I used chan's FatFs in my project and added keil mdk usb device mass storage with cmsis driver. While connecting to pc shows device descriptor correctly and Ii is recognized as a mass storage device but windows can not specify number of disk sectors correctly. Formating and exploring it is not possible. I have formatted it within a firmware with f_mkfs function and I am almost sure that chan's FatFs works correctly in my project. I wonder to know if someone have any related experience?

Re: LPC1754 USB mass storage

Pablo_Ramos — Wed, 10 Dec 2025 20:17:02 GMT

Hi @jalilisahar,

Please refer to the application note FAT library EFSL and FatFs port on NXP LPC1700 (AN10916). This document describes, in a step-by-step manner, how to port FatFs to the LPC1700 series.

Additionally, it provides sample software that has been tested on Keil’s MCB1700 evaluation board (LPC1768).

You can find the application note in the documentation section of the LPC1754 product page.

Best Regards,

Pablo

topic Re: LPC1754 USB mass storage in LPC Microcontrollers

LPC1754 USB mass storage

Re: LPC1754 USB mass storage